基于射频识别的室内定位系统算法研究  

Indoor Positioning System Algorithm Based on RFID

作　　者：石雪军 纪志成[1] 

机构地区：[1]江南大学电气自动化研究所,无锡214122

出　　处：《系统仿真学报》2015年第6期1294-1300,共7页Journal of System Simulation

基　　金：国家高技术研究发展计划(863计划)(2013AA040405)

摘　　要：针对无源射频识别(Radio Frequency Identification,RFID)定位问题,在对比分析基于信号到达角(Angle Of Arrival,AOA)和信号到达时间差(TimeDifferenceOfArrival,TDOA)2种定位算法的原理和优缺点的基础上提出了无源超高频(Ultr High Frequency,UHF)RFID室内定位混合方法,该方法以AOA定位算法为核心,融入了TDOA算法时间差的思想,并使用步进电机代替天线阵列,以一定的角速度带着UHF RFID阅读器绕轴旋转扫描标签以估算待定位标签的位置。仿真结果表明:该室内定位混合方法的精度优于以上任何一种单独的定位算法,是一种更加有效、定位更加精确的技术手段。In order to solve the radio frequency identification(RFID) positioning problem,the working principle,advantages and disadvantages of two positioning methods(AOA and TDOA) were analyzed in detail by comparison,on the basis of which,an indoor positioning hybrid approach of Ultra High Frequency(UHF) RFID was proposed.This proposed approach took the AOA as the core and integrated the idea of time difference in TDOA.Moreover,the stepping motor and UHF reader were used simultaneously instead of antennas array to make UHF RFID reader whirl around an axis.Therefore,it is easy to scan each tag that can be found with the constant angular rate and estimate their locations.The simulation results indicate that the accuracy of hybrid approach is better than separate positioning algorithm,which is a more effective and more precise positioning technology.

关 键 词：射频识别 信号到达角 信号到达时间差 无源超高频 混合方法 

分 类 号：TP391.44[自动化与计算机技术—计算机应用技术]